TW201043365A - Double-sided cutting inserts for high feed milling - Google Patents

Abstract

A double-sided cutting insert with a plurality of indexable convex cutting edges can have a top face and a bottom face, at least three convex cutting edges on each face connected by at least three nose corners, at least three peripheral side surfaces extending from each face toward a virtual middle plane; and a common lateral seating surface on each peripheral side surface. Each convex cutting edge can have at least a curved cutting edge region, and can further have a primary substantially straight cutting edge region intermediate the curved cutting edge region and the nose corner. Each peripheral side surface can further have a primary planar facet associated with the primary substantially straight cutting edge, and each face may also be single-handed in same direction.

Description

201043365 VI. Description of the Invention: [Technical Background] The present disclosure is directed to a double-sided cutting insert. The double-sided cutting insert exhibits a combination of favorable cutting edge strength and unique cutting edge geometry, thus allowing for a wide range of milling operations with high feed rates for face milling, slot milling, straight milling, and beveling. Carbides or other types of cutting inserts are known in the industry. Many indexable cutting inserts are single-row (right or left) (one-way operation) because the geometry in the rotary mechanism is limited to 0, where the cutter is rotated against the rotating workpiece being ground. Recently, the demand for low cost and high productivity in the metal mechanism industry is increasing. From a geometric point of view, two common methods for designing indexable carbide cutting inserts are to design double-sided cutting inserts or to design more usable cutting edges on single-sided cutting inserts. Double-sided cutting inserts can double the number of available cutting edges, so there is a cost reduction benefit for both the end user of the cutter and the cutter manufacturer. An ideal solution for a productive indexable cutting insert design would be to have more available cutting edges and double sided. However, due to the complexity of placing the double-sided cutting insert in the insert pocket on the Q-seat of the cutter, the geometry of the double-sided cutting insert for milling is a more challenging task than the conventional single-sided cutting insert. The difficulty is increased as the number of cutting edges increases. In addition, the design of single-row, double-sided cutting inserts for milling operations with more indexable cutting edges is even more challenging. The two sides of a single-row double-sided cutting insert may not be mirror images of each other. In the case of a single-row double-sided cutting insert having a convex cutting edge and a conical peripheral surface, it is a common square, square or parallelogram double-sided surface which is flat or perpendicular to the surface of the base in the insert pocket of the holder. Cutting inserts are difficult to fix cutting inserts with convex peripheral contours, and their design is even more challenging. A single-sided cutting insert for high-input plane milling is disclosed in U.S. Patent No. 7,22G () No. 83, which is incorporated herein by reference. It is incorporated by reference in the above-mentioned U.S. Patent No., No. 83, the continuation of the patent application on August 16th, the public secret country patent application case is disclosed in No. 4, 2007/0189864. This patent and the disclosure of the disclosure disclose a single-sided cutting insert having four convex cutting edges each joined by a tenon, each convex cutting edge having a curved cutting edge region and one or more substantially straight Main cutting edge area. The curved cutting edge area has a large radius, which facilitates the advancement of the plane milling operation. However, this insert is single-sided and therefore has only four indexable cutting edges. Double-sided cutting inserts are disclosed in, for example, U.S. Patent Nos. 6,92,429, 7' 232,279, 7,241,082, 6,921,233, 7, 306,409 and 6,543,970. The double-sided cutting inserts described above provide more indexable cutting edges, but the cutting edges of such inserts are less suitable for use than the cutting edges of single-sided cutting inserts described in the aforementioned U.S. Patent Application Publication No. US 2007/0189864. High feed sharp work. Therefore, it is convenient to produce a double-sided cutting insert having eight indexable cutting edges, wherein each of the boring edges has a high-feed milling operation as described in the aforementioned U.S. Patent Application Publication No. US 2007/0189864. Features. SUMMARY OF THE INVENTION In order to address the above needs, the present disclosure describes various specific forms of double-sided cutting inserts for milling operations such as face milling, slot milling, straight milling, and beveling operations. The double-sided cutting insert provides eight indexable cutting edges, each combining a favorable cutting edge strength with a unique cutting edge geometry for easy milling at higher feed rates. More specifically, a double-sided cutting insert having a plurality of indexable convex cutting edges can be generally included in the package 4 201043365. A top surface and a bottom surface are separated by an intermediate virtual plane; on each of the top and bottom surfaces At least three convex cutting edges each having at least one curved cutting edge region; at least three tenons on each of the top and bottom surfaces, each tenon connecting two of the convex cutting edges At least three peripheral surfaces extending from each of the top and bottom surfaces to an intermediate virtual plane; and at least three lateral seating surfaces, each of the lateral seating surfaces being formed on one of the top and bottom peripheral surfaces Upward, such that each of the lateral seating surfaces defines one of the top and bottom surfaces to share a lateral seating surface. Each side of the peripheral surface may include a main conical peripheral surface Q-face extending from the curved cutting edge region toward the intermediate imaginary plane and a secondary conical peripheral surface extending from the ridge toward the intermediate imaginary plane. In some specific forms, the bottom surface is a mirror image of the top surface for the intermediate virtual plane, and a geometry for chip breaking can be disposed on each of the top and bottom surfaces. In other specific forms, the 'per-convex cutting edge may have a substantially flat main marginal region disposed between the cutting edge region of the material and the tenon, and the scale-peripheral surface may have - from the substantially straight major cutting edge The intermediate virtual plane extends the flat main hemp. In each of the specific forms of the substantially straight main cutting edge region, each of the top and bottom surfaces can be twisted &quot; (i.e., rotated relative to each other) such that each of the top and bottom surfaces is a single row in the same direction. Each of the main conical peripheral surfaces associated with the top surface may extend outwardly toward the intermediate imaginary plane at a first angle opposite thereto, and each of the main conical peripheral surfaces associated with the bottom surface may also be opposite the middle The same first angle of the imaginary plane extends toward the intermediate imaginary plane. Each of the common lateral seating surfaces can be formed by cutting a portion of the adjacent peripheral surface pair. These and other advantages will be apparent from the description of some of the following formulas. [Summary diagram] 5 201043365 The specific form of the double-sided cutting insert can be referred to _ each figure to better understand. Figure 1 is a perspective view of a specific form of a double-sided single-row cutting insert; Figure 2 (a) - 2 (c) Figure 3 (4) and 3 (b) illustrate the top and detail views of the double-sided single-row cutting insert shown in Figure 1; Figure 4 (a) - 4 (C) convenient Understand the mathematical relationship of the single row geometry between the two sides of the cutting insert shown in Figure 1; Figures 5(a)-5(c) illustrate a specific form of another double-sided single-row cutting insert; Figure 6(a) and 6(b) illustrate Further two-sided single-row cutting inserts in specific form; Figures 7(a) and 7(b) illustrate a further two-sided single-row cutting insert in a specific form; Figures 8(a) and 8(b) show that the milling cutter holder is fixed thereto Side and top views of the double-sided cutting insert; Figures 9(a) and 9(b) illustrate a specific form of a double-sided cutting insert having five sides; Figures 10(a) and 10(b) illustrate one having three The side double-sided cutting insert has a specific form; and Figures 11(a) and 11(b) illustrate a further double-sided cutting insert having two sides. [Detailed Description of the Disclosure] It is to be understood that the description of the present invention is to be construed as illustrative and not restrictive element. It will be apparent to those skilled in the art that the present invention may be <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; However, the description of such elements and limitations is not provided herein, as other elements and/or limitations of the invention may be determined by those of ordinary skill in the art in light of the description of the invention. For example, as discussed in 201043365, the specific form of each cutting insert can be produced into a flat sharp insert and other material cutting inserts. The cutting insert manufacturing method is known to those of ordinary skill in the art and will not be described in detail herein. In addition, all geometries should be considered, and the term “大致#” means that the shape is made within the typical design and manufacturing margin of the cutting insert. Moreover, some specific forms in accordance with the present disclosure are disclosed in the form of a face milling insert. However, it will generally be appreciated that the double-sided cutting inserts can be embodied in a variety of forms and used in the end use, the latter being not specifically indicated herein. For example, those skilled in the art will recognize that 〇 each of the double-sided cutting inserts can be made into cutting inserts for other methods of moving metal away from the workpiece. Some specific forms of the present invention are directed to double-sided cutting inserts, including double-sided single-row inserts that provide an increased number of indexable convex cutting edges. In addition, each cutting edge can be configured to provide a combined advantage of a circular cutting insert having a large radius and a conventional size square insert for use in a variety of milling and mechanism applications. 1 and 2, in particular, a perspective view of FIG. 1; a specific form of a double-sided cutting insert 10 having a plurality of (8 shown in the drawings) indexable convex cutting edges, which may include: The top surface u and the bottom surface 12 are separated by an intermediate virtual plane 13; at least three convex cutting edges 2 and 31 on each of the top surface and the bottom surface i2, each of the convex cutting edges 2 and 31 have at least - Cutting 22, 32; at least three tenons 25 on each of the top surface 11 and the bottom surface 12, evil, each of the convex milk, 35 connecting two of the convex cutting edges 2, 31; at least three peripheral tables From 19, 2, extending from each of the top surface u and the bottom surface 12 to the intermediate virtual plane 13; and at least three lateral seating surfaces 41, each lateral seating table (4) forming a phase of the _ plane n and the bottom surface 12 The pair of side surfaces are 192 , such that each of the lateral seating surfaces 41 defines a common lateral seating surface for one of the top surface and the bottom surface 12. 201043365 Each-peripheral surface 19, 20 may comprise a main circle _ edge surface 26, 36 extending from the -f curved cutting edge region, 32 toward the intermediate imaginary plane 13, and - self-convex milk, milk toward the middle virtual plane 13 extended times - peripheral surfaces 29, 39. For the purposes of this description, the term "face" used in relation to the top surface 11 and the bottom surface 12 can generally be referred to as the top of a double-sided cutting insert, a semi-mine or part, and a bottom and a half. Department, or part,. In addition, the double-sided paste plug-in _ is shown as having a #四之礼长, but should be Ο

The solution of the double-sided chopping element 10 may also be a three-sided three-sided or other form having a five-dollar polygon, as will be explained later in connection with Figures 9-11. In some specific forms, the bottom surface 12 is a mirror image of the top surface U for the intermediate imaginary plane 13 such that the top surface 11 and the bottom surface 12 are not in the same direction as a single line (see Figure 6 and later in detail). Geometrical milk for chip breaking, 46 may also be provided on each of the top surface 11 and the bottom surface 12. In some specific forms, the shape of the top and bottom surfaces is such that the top and bottom surfaces are still in the same direction (see the details of g5 in the following). Furthermore, each of the convex cutting edges 21, 31 may be disposed between the curved cutting edge regions 22, 32 and the tenons 25, 35 - substantially straight major cutting edge regions 23, 33, and each peripheral surface 19, 2 may have Flat main facets 27, 37 extending from the substantially straight major cutting edges 23, 33 towards the intermediate imaginary plane 13. The substantially straight major cutting edges 23, 33 (sometimes referred to as wiper jaws) act in conjunction with the associated flat main facets 27, 37 to improve the surface finish of the machined workpiece. In addition, each of the convex cutting edges 21, 31 may also have a substantially flat secondary cutting edge region 24, 34 disposed between the curved cutting edge regions 22, 32 and the tongue 25, and each peripheral surface 19, 20 may be There are flat facets 28, 38 extending from the substantially flat secondary cutting edges 24, 34 toward the intermediate imaginary plane 13. The substantially straight secondary cut edges 24, 34 and associated flat secondary facets 28, 38 together provide the clearance required for the substantially flat major cutting edges 23, 8 201043365 33 and associated flat main facets 27, 37. In a specific form of at least one substantially straight major cutting edge region 23, 33, each of the top surface η and the bottom surface 12 can be twisted and twisted (i.e., thimbled) so that the top surface and the bottom surface u Can be a single line in the same direction. In this case, each of the top surface U and the bottom surface 12 will not mirror each other with respect to the intermediate virtual plane 13. Each of the main conical peripheral surfaces 26 associated with the top surface 11 can extend outwardly toward the intermediate imaginary plane 13 at a first angle opposite thereto, and each of the main conical peripheral surfaces associated with the bottom surface 12 can also A first angle relative to the intermediate imaginary plane 13 that is identical to the major conical peripheral surface 26 associated with the top surface 11 extends outwardly toward the intermediate imaginary plane 13. As understood by those of ordinary skill in the art, the peripheral surfaces of the cones are caused by the curvature of the insert face. By way of example, the curved cutting edge region creates an associated conical peripheral surface, i.e., the aforementioned peripheral surface of the main cone. Similarly, the projections defining the curved edges of the top surface also form a conical peripheral surface, i.e., the aforementioned secondary conical peripheral surface. Conversely, when a substantially straight* cutting edge such as a substantially straight major cutting edge region is provided, a flat peripheral surface or facet is also produced, and 〇 (i.e., the aforementioned flat main facet) is substantially straight as associated. The clearance surface of the cutting edge region. It is generally understood that a curved beta line, such as a cutting edge, can be formed from a series of small straight segments. However, as will be understood by those of ordinary skill in the art, the substantially straight cutting edge regions described herein are the respective cutting edge regions or portions of the entire convex cutting edge. Therefore, the substantially straight cutting edge area is not only the 'bending cutting edge area, one part or section', but also one of the parts of the entire convex cutting edge that are separated and different. This is the fact that each substantially straight cutting edge region described herein has a flat clearance surface associated with it (e.g., a flat facet) rather than a conical peripheral surface (as associated with the curved cutting edge regions). Further clarification. The primary and secondary, respectively, flattened facets impart a wiping function to the substantially straight main cut 201043365 chamfering regions 23, 33 and provide the clearance required for substantially straight secondary cutting edges 24,34. ★ Flat facet &quot; can also be replaced by the term "flat clearance". Moreover, as described herein, the curved cutting edge region and the generally straight cutting edge region are viewed from above, curved &quot; or '^ substantially straight, (ie, in the top view), as shown in Figure 2 ( a), 3(a), 4(a), 5(a), 9(a), 10(a) and 11(a). Each of the common lateral seating surfaces 41 can be formed by cutting off an adjacent peripheral surface of one of the μ, 2 ( (the adjacent pair is the top surface U and the bottom surface 0 of the cutting insert 10 extending toward each other on the same side) 12 peripheral surfaces 19, 20). Specifically, as described above, on each side of the cutting insert 10, each of the peripheral surfaces 19, 20 on both the top surface 11 and the bottom surface 12 extends toward the intermediate imaginary plane 13, that is, each peripheral surface on the top surface 11. 19 is one on the bottom surface 12, and the adjacent &quot;peripheral surface 2〇 extends. Accordingly, the peripheral surface 19 on the top surface 11 and the peripheral surface 2 on the bottom surface 12 will meet each other at the intermediate virtual plane 13 (i.e., intersect). Each of the shared lateral seating tables φ 41 can be created or formed by intercepting the intersections of the adjacent peripheral surfaces 19, 20 (e.g., by smoothing). As shown in the various figures, each of the common lateral seating surfaces 41 can terminate in close proximity to each of the curved cutting edge regions 22, 32 of each of the top surface 11 and the bottom surface 12 of the cutting insert 1 . In other words, the intersecting peripheral surfaces 19, 20 begin to flatten at the intermediate imaginary plane 13 and extend outwardly toward the convex cutting edges 21, 31 on each of the top surface u and the bottom surface 12. However, the grinding operation is stopped at a certain depth so that the lateral seating surface 41 does not extend entirely to the convex cutting edge 2, and the lateral seating surface 41 can extend entirely to the convex cutting edge 2 want. One or more (and typically four) plateaus may be disposed on each of the top surface 11 and the bottom surface 12, although the paste is shown on the top surface 11 only. Each plateau 16 can be flat and can be defined - Da Zhao is perpendicular to the center of a through hole 14 and draws a plane of 15 which is more fully described in relation to Fig. 8 201043365 and 9 for fixing the cutting insert 〇 Everything is stuck inside the hole. Each of the lateral seating surfaces 41 can be generally perpendicular to the plateau 16 ^ each of the tenons 25, 35 can comprise an arc, a series of arcs, and - a multi-bow cloud curve - or more The radius of each of the cutting edge regions 22, 32 may be at least twice the radius of the largest inscribed circle on the top surface n of the double-sided cutting insert 1 or the bottom surface 12. In some specific forms, the radius of each curved cutting edge region 22, 32 can be at least four times the radius of the largest inscribed circle on the top or bottom surface of the double-sided cutting insert 10. Each of the curved cutting edge regions 22, 32 may comprise one or more of an ellipse portion, a portion of the relief line, and a __ multi-bow 0 surface cloud curve. The intermediate imaginary plane 13 will generally be positioned at one-half the depth of the cutting insert 1〇. Both the top surface u and the bottom surface 12 can comprise the same face geometry and perimeter. As shown in FIG. 面, both faces n and 12 are single rows and are twisted relative to each other (ie, the relationship between the rotating top surface u and the bottom surface 12 and the torsion A (ie, rotation) surface geometry is due to the desire to cut pieces. Each face is produced as a single row. In many milling applications, each cutting edge is fully engaged during cutting, and sometimes (for example, the specific form shown in Figure 4) has many features and such convex cutting edges. And the clearance surface required for each of the two sides of the double-sided cutting insert 1 () on each side of the cutting edge is coupled. It can be set - the towel core 15 is perpendicular to the through-hole 14 of the imaginary plane 13 between the towels to touch the flat plateau 16 The insert il is set in the - knife seat. As shown, each side u of the double-sided cutting insert 1 () can have four sets of the same convex and rim edge connected by the convex ridge 25 as an example. Each of the convex cutting edges 21 &amp; includes a curved cutting edge region 22 having a large radius, a substantially flat major cutting edge, and a random substantially straight secondary cutting edge 24. As described above and in other related figures Both of them are generally straight cutting edge regions, and are straight, meaning that they are flat along the central axis 15. Each convex cutting edge 21 can have an associated The peripheral surface 19 extends toward the intermediate imaginary plane 201043365 face 13 in an outward angular direction. The peripheral surface 19 may be greater than 90 degrees from the plane of the virtual plane 13 and/or the flat plateau 16 generally parallel to the intermediate imaginary plane 13 Externally inclined. Each outwardly inclined peripheral surface 19 can be flattened by the peripheral surface of the main cone associated with the f-curved cutting edge region 22, and flattened with the substantially straight main cutting ship 27, : the undercut edge &amp; the associated random flat facet 28, and the minor conical peripheral surface associated with the tenon 25 constitute a zero. Similarly, the bottom surface 12 may have four identical ones each having a tenon 25 Between each of the convex cutting edges 31, each of the convex cutting edges 31 may include a radiused curved cutting edge region 32'-a substantially straight major cutting edge 33, and a random substantially straight secondary cutting edge region 34. Just as the top surface ^, each convex cutting edge 31 can be associated with the peripheral surface 20 extending toward the intermediate virtual plane 13 in the direction of the outward angle. Like the peripheral surface 19 associated with the top surface u, the periphery Surface 2〇 may be relative to the intermediate virtual plane 13 and/or generally parallel to the fiscal level The flat plateau of 13 is inclined outwardly by more than (10) degrees. Similarly, each outwardly inclined peripheral surface 20 may be made by a main conical peripheral surface 36 associated with the curved cutting edge region 32, _ with a substantially straight main cutting edge The associated flat main facet face 37, - an optional flat secondary facet associated with the free substantially straight secondary cutting edge 14, and - a secondary conical peripheral surface 39 associated with the tenon 35. As seen in the ® In 1 and 2, the peripheral surfaces 19 and 20 associated with the top surface u and the bottom surface 12 of the insert 1Q are not mirrored to the surface of the financial surface. (4) The peripheral surface 19 of the Na _ is adjacent to the periphery of the bottom surface 12. The surface 2Q is twisted (i.e., rotated) to account for the single row cutting direction desired in the sharpening operation. More specifically, the lateral seating surface 41 is on each of the peripheral surfaces 19, 2G, and the top surface of the insert 10 is oriented in a direction perpendicular to the intermediate imaginary plane 13 or flat; 11 and the bottom surface 201043365 12 each of the two adjacent main conical peripheral surfaces 26 on the peripheral surface, 26% cut off. As shown, the common lateral seating surface 41 terminates in close proximity to each of the cutting edge regions 22, 32 of each of the faces u, 12 of the cutting insert 1 . However, the lateral seating surface may be additionally extended to the convex cutting edges 2ι, 31, if desired. As will be described later, each of the features on the faces u, 12 of the plug-in 10 is arranged in a certain order, from, to &to; For example, referring to the insert 1 shown in Fig. i, both the top surface 11 and the bottom surface 12 of the specific form may have the same number of convex cutting edges 21 connected by the tongues 25. Such features may be, for example, a first/each tenon 25, beginning, followed by a respective substantially straight major cutting edge 23' and finally a respective curved cutting edge region having the large radius. . After assembly, the respective substantially straight major cutting edges 24 are disposed between a respective substantially straight major cutting edge 23 and the tongue 25. Corresponding to the faces u, 12 of the insert 10 are associated with the convex cutting edges 21, 31 (including the curved cutting edge regions 22, 32 and any - substantially straight major cutting edge regions 23, 33 and 24, 34). Peripheral surfaces 19, 20 (including respective conical surfaces and flat facets). The peripheral surface 19, for example, illustrated only for the top surface 11, may include a conical clearance surface 29 associated with the tenon 25, followed by a flat main that is associated with the substantially flat major cutting edge region 23. The facet 27, which in turn is associated with the arm-curved cutting edge region 22, has a main conical clearance surface 26. After the substantially flat secondary cutting edge region 24 is disposed, the flat secondary facet 28 associated therewith can be disposed intermediate the conical clearance surface 29 and the first planar facet 27. The peripheral surface 19'20 associated with each of the top surface 11 and the bottom surface 12 can be combined with a single common lateral seating surface 41. The chip breaker geometry 45, 46 (which may be provided on each side of the insert) may vary between each tenon 25, 35. More specifically, the chipbreaker geometry 45, 46 can be at one end, one end (ie, near one of the tenons 25'35) to the other 'end* (ie, one next to the tenons 25, 35). Between) 201043365 change. In addition, as viewed from the side shed, different break geometry can also result in convex cutting edges 21, 31 having a wavy configuration, such as illustrated in Figures 5 and 7.

2(a) to 2(c) are more clearly defined; further details of the single-row double-sided cutting insert 1〇 are shown, wherein Fig. 2(a) is a top view and Fig. 2(b) is a snail along the pass The hole 14 is centered and perpendicular to the cross-sectional view of the CC line of the common lateral seating surface 41, while Figure 2(c) is a side view. As shown, the &amp; cutting edge 21 can include a curved cutting edge region 22, a substantially flat major cutting edge region, a random substantially straight secondary cutting edge region 24, and a tenon 25. In Fig. 2(b), the plug-in 1 is exemplified to be placed in the same manner as the machine-made » inserting the plug 1Q gj in the holder, wherein the generally straight main thief 23 series is placed «straight to the knife The 鸠-axis of the seat (refer to Figures 8 and 9); the substantially straight main paste edge region 23 is aligned with the surface on which the workpiece is being operated in this manner, and the surface treatment condition of the workpiece is improved. As also shown, The maximum depth of cut (D0C) in the boring operation will occur at point 58 on the other side of the convex portion 25 where the f-cutting region 22 is touching the side of the workpiece. For example, @1 and 2 cap configurations The cut 1_1 design is moved in one direction, so it is called a single-row cutting insert. Refer to Figure 2(b); in the imaginary plane 13 (or one of the top planes of the cutting insert 1) An angle of A1_t〇p may be defined between the peripheral surface 26 of the main cone. The distance between the curved cutting edge region 22 on the top surface u and the common lateral seating surface 41 may be defined as a D-kiss. 'Each convex cutting edge 21 and an outwardly inclined circumference comprising a peripheral surface of a main cone, a flat main facet π and a random flat facet 28 The surface is associated with each other. Further, the _ sub-circumferential peripheral surface 29 is associated with the - bulge 25. Each of the peripheral surfaces extends toward the intermediate imaginary plane 13 at half the insertion speed of the insert, and can be substantially Here, one of the upper faces is replaced by a circle 2 (c); in the middle of the imaginary plane 13 (or the top surface of the cutting insert 1 2010 14 201043365 plateau (8) and - can represent any of the above surfaces (4) on the top surface u of the cutting insert (4) 28 or 52 can be bounded - A2 - top angle. Similarly, an ai-(four) angle can be defined between the intermediate virtual plane 13 (or one flat plateau 51 on the bottom surface 12) and the main cone peripheral surface 36. The distance between the upper tube curved cutting edge region 32 and the common lateral seating surface may be defined as D-bot. Furthermore, the intermediate virtual plane 13 (or flat plateau 51) and a similar surface may represent the dicing member 10. The surface of the bottom surface 12 - the surface of the surface H or 39 may define an A2_bot angle. Further, the surface of the main conical surface on the top surface 11 or the bottom surface 12 of the paste insert 1G. 26 or 36 can be bounded by n(10) angles. Therefore, after the above definition is ready, the following formula (1) can be established to quantify The relationship between the relevant surfaces is used as a basis for geometric design: 俎一细2 90. D—top= D_bot A\_top^ A\_bot (1) 〇Al—topUt A\_top=A2”〇p J3_co/b- JI_ top- 9〇° One of the important features of the double-sided cutting inserts described herein is the common lateral seating surface 41. This common lateral seating surface is intended to make double-sided cutting inserts, especially convex. The single-row, double-sided cutting insert with a cutting edge and a generally conical peripheral surface that is capable of being fixed to the insert hole in the holder's seat also provides all the necessary cutting geometry in the milling operation. In order to mathematically develop how to create this common lateral seating surface, it is useful to understand how the two sides of the single-row and double-sided cutting inserts are twisted relative to each other (ie, rotated). 3(a) and 3(b), wherein Fig. 3(a) is a top view, and circle 3(b) is an enlarged detail view of the 〃 section in Fig. 3(a); Face cutting insert 55. The outer curve 58 is an outline that is generally at the intermediate imaginary plane at half the thickness of the cutting insert 55. The cutting edge regions 61 to 65 indicated by solid lines are attached to the top surface of the cutting insert 55. The cutting edge region 61 corresponds to a curved cutting edge region having a large radius R1_top greater than or equal to the radius R_ic of the inscribed circle 59 (on the top or bottom surface of the cutting insert 55); the cutting edge region 62 corresponds to a length L1_top Q is substantially straight to the major cutting edge region (as seen in the top view); the cutting edge region 63 corresponds to a random substantially straight secondary cutting edge region of length L2_top (also as seen in the top view); the cutting edge region 64 corresponds to one The radius R2_top is convex; and the cutting edge region 65 corresponds to a curved cutting edge region (the same curved cutting edge region 61) connected to the other side of the tenon 64. The cutting edge regions 61 to 63 are thus understood to comprise one of the four identical convex cutting edges illustrated on the top surface of the double-sided cutting insert 55. A substantially offset major angle A4_top is present between the generally straight major cutting edge region 62 and the random substantially straight secondary cutting edge region 63. This A4_top offset angle can be set to prevent the tenon 64 from contacting the surface of the workpiece perpendicular to the central axis Q of a tool holder. Similar to the top surface of the cutting insert 55, the cutting edge regions 71 to 75 indicated by broken lines are attached to the bottom surface of the cutting insert 55. The cutting edge region 71 corresponds to a curved cutting edge region having a large radius Rl_bot greater than or equal to twice the radius R_ic of the inscribed circle 59; the cutting edge region 72 corresponds to a substantially flat major cutting edge region of a length L1_bot; The region 73 corresponds to a random substantially straight secondary cutting edge region of a length L2_bot; the cutting edge region 74 corresponds to a crown of a radius R2_bot; and the cutting edge region 75 corresponds to a curved cutting edge region connected to the other side of the tenon 74 The cutting edge regions 71 to 73 (same as the curved cutting edge region 71) can thus be understood to comprise one of the four identical convex cutting edges illustrated on the bottom surface of the double-sided cutting insert 201043365 55. As described above with respect to the top surface, a substantially offset angle A4_bot is also provided between the substantially straight main cutting edge region 72 and the random substantially straight secondary cutting edge region 73. The quantitative relationship between the above parameters can be expressed by the following formula (2): R^-topeRi_bot L\_top=L\-bot L2_top=L2_bot (2)

Kl_top=Kl_b〇tq M_ top= M_jbot * R_jc ^&lt;AA_top^° It is understood from the drawings, in particular Fig. 3(b), that the top surface of the cutting insert 55 is twisted (i.e., rotated) with respect to the bottom surface of the cutting insert 55. ). This torsion is relative to the imaginary convex centerline 57 which passes through the center of the inscribed circle 59 and a imaginary convex center 70, as if the top and bottom surfaces are not twisted by a single row effect. A mathematical relationship may be derived from the two sides of the cutting insert and the common lateral seating surface between the single row geometry as a next step to further quantify a single row of two sides having a large radius convex cutting edge Cutting inserts. 4(a) to 4(c); a specific form of a high-feeding sharp single-row double-sided cutting insert 81 is shown, wherein FIG. 4(a) has an inscribed circle 82 and a Fig. 4(c) is a magnified detailed view of the cross section of Fig. 4(a); and Fig. 4(b) is a view of Fig. 4(c) A side view of the projection along the direction of the PO line segment 84 in the middle. Some unrelated straight lines in Fig. 4(c) are removed for clarity; the top convex cutting edge 9〇 of the solid line includes a random substantially straight secondary cutting edge region 93 connected to the tenon 92, one in random A substantially straight primary cutting edge region 94 after the substantially flat secondary cutting edge region 17 201043365 field 93, and a curved edge region 95 connected between the substantially straight major cutting edge region 94 and the next one of the tenons. Similarly, on the same portion shown in Fig. 4(c) but at the bottom surface of the cutting insert 81, the bottom convex cutting edge 1 of the broken line includes a random substantially straight cut that is connected to the tenon 1〇2. The edge region 103, a substantially flat major cutting edge region 104 after a random substantially straight secondary cutting edge region 1〇3, and a connection between the substantially straight major cutting edge region 1〇4 and the next one of the tenons 106 The curved edge region is 1〇5. As also shown in Fig. 4(c), the origin ν of the established χ γ coordinate system is centered at the center of the circle 82. The &quot;axis represents the cutting axis of the milling cutter, and the X&quot; axis is parallel to the surface of the workpiece in the positive mechanism. Therefore, if the cutting insert 81 is mounted in the insert of the sharp knife, a substantially flat major cutting edge region 111 (previously defined as L1_top in Fig. 3) will be perpendicular to the T axis (i.e., the cutting axis of the milling cutter). Extend in the direction. Since the four identical convex cutting edges on the top surface of the cutting insert 81 can be centered around the center of the inscribed circle 82, it is defined by D-ctr_topl (as seen in Figure 4(c)) from the center v to substantially straight. The vertical distance of the cutting edge region ill must be equal to the vertical distance from the center to the substantially straight major cutting edge region (10) as defined by D_ctr_t〇p2 (also seen in Figure 4(c)), Q by the following equation (3) Mathematical explanation: (D_ctr_top)/=(D_ctr_top)/+i &gt; /=1,2,3 (Ll_top)/= (Ll_top)/+i &gt; /=1,2,3 (3) In the previous formula, D_ctr_top Mainly by design parameters such as a radius R1_top of a curved cutting edge region, a radius R_ic of the inscribed circle, and a length of a substantially flat major cutting edge region, and the number of convex cutting edges (four in each specific form described herein) )). Similarly, the substantially straight major cutting edge area 104 (defined as Ll_bot) defined as a vertical distance from D_ctr_bot shown in Fig. 4(c) to the center, 0将 will satisfy the following mathematical relationship: 201043365 (D_ctr_bot)/ =(D_ctr_bot)/+i &gt; /=1,2,3 (Ll_bot)/=(Ll_bot&gt;i » /=1,2,3 (4) ο Further, as already discussed in Figure 3, there is a pass The center line of the virtual convex portion of the center of the circle 59 and the center of a virtual convex portion 7' seems to be such that the top and bottom surfaces are not twisted due to the single-row effect. There are four center lines of the virtual convex portion, each of which has a convex line - strips, as shown in Figure 4(c), the virtual convex centerlines 113 and 114' which are at a 9 degree angle to each other. For this particular embodiment, there are four sets of identical convex cuts on each side of the cutting insert 81. Therefore, the position A of the substantially flat main cutting edge region 111 and the imaginary convex center line 114 在 on the top surface U should be equal to a substantially straight surface on the bottom surface 12. The angle between the main cutting edge region 104 and a virtual convex center line 114 A_n〇seJ) 〇t ^ In addition, the D_ center-top and the D-center-bottom are clearly equal to each other. Therefore, the following formula can be derived: (A_nose_top), =(A_nose_bot)i, i=l,...,4 (D-Ctr_t〇P)F (D at 1...,4 (5) Ο Once the single-row double-sided cutting The insert 81 establishes equations (3) through (5) to determine the position and orientation of both the substantially flat major cutting edge region 94 and the bottom surface 12 of the top surface - - substantially straight major cutting edge regions 1 〇 4 Secondly, extending the substantially straight major cutting edge region 94 may introduce a straight line 扒, and extending the substantially straight major cutting edge region 104 may introduce a straight line 1 〇. The two straight lines 97 and ι 7 intersect at a point. Above the top surface and the bottom surface, a third straight line 84 can be pulled out from the point to the center, and V' is the center of the inward κ 82, but also acts as a rotation point of the four indexable convex cutting edges. Therefore, the fuzzy meaning of 0 4(e) can be used to obtain the following formula by using A~nose~top between New π and (10) to define the line segment P0 in the XOY coordinate system: Y=tan (A_nose_top (6) Thereafter, the equation of the straight line 116 perpendicular to the straight line 84 can be expressed by the following equation (7): 19 201043365 X*cos(A_nose-top -7γ/4) + Y*sin(A_nose_top -7γ/4) + two = 〇 (7) style today: PO =D_ctr_top/ CQs〇i_nose_top - π/4) and D_cut= D_top^s\n{AZ_coni) Therefore, the line 116 can be used to construct a plane perpendicular to an intermediate imaginary plane (or flat plateau). This plane can be used to cut off the major conical peripheral surfaces 122 and 123 on the top and bottom surfaces to create a common lateral seating surface 121, as shown in Figure 4(b). This side acts as a fixed surface for the seating surface, such as the common seating surface of the one-sided face geometry and the one-sided bottom geometry, even if the two are twisted relative to each other. 5(a) to 5(c) show a further specific form of a single-row double-sided indexable cutting insert 121, wherein FIG. 5(a) is a view, FIG. 5(b) is an enlarged top view, and FIG. 5( c) is a side view. As shown, the double-sided cutting insert 121 can have four convex cutting edges 122a-122d on the top surface 123 and four convex cutting edges 124a-124d on the bottom surface 125. Each of the top surface 123 and the bottom surface 125 has the same convex cutting edge. Each of the convex cutting edges on the top surface 123 may be joined by a tenon 13 133, 135 〇 and 137. Although not shown, each of the convex cutting edges on the bottom surface 125 can also be joined by a tenon. The top Φ 123 and the bottom surface 125 are spaced apart by an intermediate virtual plane 126 at half the thickness of the cutting insert 121. In this particular form of cutting insert 121, each of the convex cutting edges can simply include curved cutting edge regions 132, 134, 136 and 138 without the substantially straight cutting edge regions described in the previous specific forms. It can be assumed that the virtual main line (4) can function the same as the substantially flat main cutting edge region 23 in Fig. 2(a), or the substantially straight main cutting edge region in Fig. 4(6) when the double-sided cutting insert (2) is As shown in Figure 5 (6), as if it were placed in the holder during the actual milling operation (similar to the circle illustrated in 201043365 2(a) or Figure 4(c)), the virtual main line 141 is thus perpendicular to Axis (ie the cutting axis in the tool holder). Since each of the convex cutting edges 122a-122d includes only a curved cutting edge region 132, 134, 136 and 138, the cutting insert 121 can be a double-sided cutting insert without any twist between the top surface 123 and the bottom surface 125. This is because: the convex cutting edges do not contain any substantially straight cutting edge regions near the tenons; the second 'through the center of the tenons 133 and the center line 143 of the inscribed circle 144 are no longer like the figure. 4(c) is the genus of the straight line 114 and the center line of the imaginary convex part. The same applies to the crown centerline 145 passing through the center of the tenon 131 and the center of the inscribed circle 144. As a result, a line 146 perpendicular to the line 147 (curving the cutting edge region 132) passing through the center of the curved cutting edge region 132 and the center of the inscribed circle 144 can be introduced in Fig. 5(b). Based on this line 146, a plane perpendicular to an intermediate imaginary plane 126 (or flat plateau 15 〇) can be constructed and used to cut off the main conical peripheral surfaces 151 and 152 on both the top and bottom surfaces to create a common side. The seating surface 153 is shown in Figures 5(a) and 5(b). The position of the common lateral seating surface 153 is determined by the D-cut between the straight line 146 and the pre-cut outer contour 155 (intersecting with the straight line 147, P&quot; point), as shown in the imaginary line in Fig. 5(b). Shown. As previously mentioned, an insert designed as described in Figures 1-4 allows the insert to be operated in only one direction, so called a single row 'however, for example, the specific form shown in Figure 5, the convex cutting edge and the clearance surface Although the design is not a single line, the geometry of the chip breaker on the face of the insert still varies between the two ridges, so this specific form is still considered as a single line. &nbsp; However, this particular form The insert does not have a 'twist # geometry' as in the previous specific multi-forms between the top and bottom surfaces. As described above, for example, in each of the specific forms shown in FIGS. 1-4, the top side is opposite to the bottom side, and the reason for twisting the twist is the top woven shape _ relative to the fine cast (four), and the gift is turned over to use the bottom at 201043365. When the sides are in the same cutting direction, the orientation of the cutting edges in the same cutting direction will be the same as the cutting edge on the top side, because the peripheral geometry between the ten abutments is asymmetrical to the central virtual plane between the two tenons, so that the periphery of the top is not Coincident or completely overlapping. Therefore, since the two curved edge regions having the large radius coincide with each other, the respective convex portions are '&quot; twisted due to the asymmetry of the entire rim edge with respect to the two convex ridges and the plane. Therefore, the double-sided cutting insert m as shown in Fig. 5 is still a single-row cutting insert because the chip breaker geometry 156 as shown in Fig. 5 (6) is asymmetric to the center line 147 or the center line 145, and 1^ The step is such that the resulting cutting edge, such as 122a, is waveformed and asymmetrical to centerline 157 as seen in the side view of Figure 5(c). This can be considered as a special case of the single-row double-sided cutting insert as described in the previous drawing. Therefore, all of the former formulas (1)-(3) and (6)-(7) can be changed. Some symbols can be applied to cover the periphery of the top surface u and the periphery of the bottom surface 12. There is no difference, for example, A_n〇se replaces A_n〇se-top, D_ctr replaces D-Ctr_t〇P, R1 instead of Rl t〇p, and so on. In addition, similar to that illustrated in Figures 1 through 4, the curved cutting edge region 132 can have a radius R1 that is greater than or equal to twice the radius R-ic of the inscribed circle 144, the circle being tangent to the imaginary of the cutting insert 121 The outer contour 158 at the plane 126. Each of the cutting edges on the top surface 123 forms an outwardly inclined peripheral surface ′ including a main conical peripheral surface 151 extending downward from the curved cutting edge region 132 toward the intermediate imaginary plane 126 and a center from a bulge 133 toward the middle The imaginary plane 126 extends downwards with the ® cone perimeter table® 159. The same method can be used to produce a main conical peripheral surface and a sub-cone peripheral surface at the bottom 125. Therefore, the mathematics_ of this special case can be rewritten into the following formula (8) group. J1290. Iil^2 *R_ic 22 —90. 201043365 ο·. (8) {D_ctr)i={D_ctr)H\ ^ 3 (Zl)i=(Zl)/+i &gt; ... β

Y=tan(A_nose-7r/4)*XX,cos(A_nose -^/4) + Y*sin(A_nose -^/4) + P〇~D_m refer to the double-sided cutting insert shown in Figures 6 and 7. Second, further specific form; these plug-ins are not a single line, but can be regarded as a single-line setting -w. Specifically, all scale geometric features, such as the cutting edge, the common lateral seating surface, the clearance surface, and the chipbreaker geometry, are symmetric to the central virtual plane between the two ridges. This kind of 贱 is a double-line, and can be used in any direction. The further specific form illustrated in Figures 6 and 7 is similar to the specific form shown in Figure 5, with only the symmetrical shoulder geometry and the resulting symmetrical cutting insert. Therefore, the two specific forms can also be regarded as the second, double-sided cutting inserts, special cases, and in addition, both can be quantitatively described in the above formula (8).换 Replace with Figures 6(4) and 6(6)' where Figure 6(a) is a perspective view and Figure 6(b) is a side view; a double-sided cutting insert m is shown. The top φ 162 and the bottom surface 163 are only mirror images of the intermediate virtual plane 164 at half the thickness of the double-sided cutting insert 161. Using only the top surface 162 as an example, the illustrated cutting insert 161 can include four convex cutting edges 165 &amp; 165 (1, pre-joined by four tenons 167al67d. Each convex cutting edge 165a-165d can be the same and can Only one curved cutting edge region 166a to 166d is included, each of which may have a radius greater than or equal to twice the radius of an inscribed circle. Each of the tenons 167a-167d may also be the same. The cutting insert illustrated in Figure 6(a) The geometrical features of ι61 may be the same as the corresponding geometric features illustrated in Figures 5(a)-5(c), as shown in Figure 6(a), chip breaker geometry 201043365 168 and convex cutting edge 165a The -165d (as seen from the side view) is symmetric with respect to a centerline 169 that is projected from a normal line on a common lateral seating surface 170. Similarly, Figures 7(a) and 7(b) A further form of the double-sided cutting insert hi is illustrated, wherein FIG. 7(a) is a perspective view and FIG. 7(b) is a side view. The top surface 172 and the bottom surface 173 of the insert 171 are also opposite to each other in the intermediate virtual plane 174. Mirroring. Using only the top surface 172 as an example, the illustrated cutting insert 171 includes four convex cutting edges I75a-175d, each of which may be the same, and each of which may be A curved cutting edge region 176a-176d having a radius greater than or equal to twice the radius of an inscribed circle is included. Each of the tenon cutting edges 175a-175d may be connected by the same tenons 177a-177d. Geometrical features of the cutting insert Π1 Can be identical to the corresponding geometrical features illustrated in Figures 5(a)-5(c), as shown in Figure 7(a), 'chip breaker geometry 178 and convex cutting edges 175a-175d (by side view) Seen as wavy) The two are symmetrically centered on a center line 179 produced by projecting a view on a common side of the common seating surface 1 . To make the double-sided insert as described above with respect to Figures 1 through 7, Forming an insert and an embryo in the press with a punch and a bottom punch. The insert is made by placing the metal powder into the mold in the press, and using the top and bottom punches. Forming the powder and pressing it into the mold. The top punch imparts a top surface geometry, the bottom punch forms a bottom surface geometry, and the mold forms the geometry of each perimeter. The insert blank thus forms a single piece and then Sintering. The sintered insert is then ground to produce the desired Finished inserts of any shape and shape, such as a convex cutting edge with a curved cutting edge region, or more generally a flat cutting edge region with associated flat facets (in some specific forms), convex radius, sharing Lateral seating surface, inclined clearance, conical clearance, etc. The insert insert may have the same approximate top/bottom side geometry as the finished insert. However, the insert insert may extend radially in the radial direction 'eg each 2 2 mm, 俾 allows grinding cans, sintered inserts 201043365 pieces to provide the desired final perimeter geometry. Figures 8(a) and 8(b) illustrate a particular form of a milling cutter system 200 that includes a tool holder 201 that can accommodate, for example, five identical single-row double-sided cutting inserts 2〇2a through 202e. The milling cutter system can include a cutter body and one or more of the aforementioned double-sided cutting inserts operatively associated with the cutter body, and applying the one or more double-sided cutting inserts to the workpiece. Fig. 8(a) is a side view showing the cutting shaft 203 of the holder or cutter body 2〇1 perpendicular to a line 205 representing the surface to be operated of the workpiece. Figure 8(b) is a top or end view showing the five cutting inserts 202a-202e received by the cutter body 201 surrounding a center of the radial centerline 204 in a circular array. As shown, all of the single row double-sided cutting inserts 2〇2a_2〇2e have four identical cutting edges joined by four identical tenons 167a-167d as previously described. Each of the convex cutting edges may further comprise a curved cutting edge region and may have a generally flat major cutting edge region. In addition, a substantially straight secondary cutting edge region can be optionally disposed as previously described with respect to Figures 1 through 4. The substantially flat major cutting edge regions of all of the cutting inserts 202a-202e are parallel to the hypothetical workpiece surface 205. 9 and 10 illustrate specific forms of further double-sided cutting inserts having alternative geometries. It is clear that all of the aforementioned double-sided cutting inserts are generally square in shape, so that four peripheral surfaces are associated with each of the top and bottom surfaces. However, those of ordinary skill in the art will appreciate that other geometries can be made. Reference is made, for example, to Figures 9(a) and 9(b), wherein Figure 9(a) is a perspective view and Figure 9(b) is a side view; a specific form of a substantially pentagonal double-sided cutting insert 230 is shown. The substantially pentagonal cutting insert 230 also has a top surface 231 and one according to the same principle as discussed above for the description of the generally square double-sided cutting insert having four identical convex cutting edges on the top and bottom surfaces. The bottom surface 232 is separated by an intermediate virtual plane 233. The top surface 231 of the double-sided cutting insert 230 can have five convex cuts each connected by a 201043365 tenon (e.g., tenon 254), a rim (e.g., a convex cutting edge 251), a common lateral seating surface (e.g., a shared side) To the seating surface 248), and the peripheral surfaces 241_245 of each of the five centers that can be torn around the center of the threaded through hole, it is meant that the double-sided cutting insert 23 has a total of ten indexable cutting edges. The per-convex cutting edge can be the same. For example, only one peripheral surface 24 of the top surface 231 is representative. Each of the convex cutting edges 251 may have at least a -f curved cutting edge region 252, and may also have a substantially flat major cutting edge region 253 disposed in the curved cutting edge region. 252 and the ridge 254. Each of the f-cutting edge regions 252 may have a large radius &gt; greater than or equal to twice the maximum radius that may be inscribed on the face 231. In addition, each of the peripheral surfaces 241-245 associated with the top surface 231 can include a main conical peripheral surface 255 extending from the curved cutting edge region 252 toward the intermediate imaginary plane 233, and a self-convex 254 extending toward the intermediate imaginary plane 233. The second conical peripheral surface 257. Moreover, when a generally straight major cutting edge region 253 is provided, the peripheral surface 241 can further include a flat major facet 256 extending from the generally straight major cutting edge region 253 toward the intermediate imaginary plane 233. Each of the common lateral seating surfaces 248 can be formed on a pair of adjacent major conical peripheral surfaces, respectively, in the same or similar manner as previously described for the common lateral seating surfaces on each of the generally square double-sided cutting inserts.顶 The top surface 231 and the bottom surface 232 extend. For both the top surface 231 and the bottom surface 232, when including the generally straight major cutting edge region 253 and the associated flat major facet 256, the double-sided cutting insert 230 will be in the same direction as a single row. It is generally understood that the bottom surface 232 has the same number and shape as the top surface 231, and includes five convex cutting edges connected by the respective tenons, and each of the convex cutting edges may include at least one curved cutting edge region. And possibly further comprising a substantially straight major cutting edge region. The bottom surface 232 has four peripheral surfaces, including the respective conical peripheral surfaces and flat facets described above for the top surface 231, extending in the same manner from the respective convex cutting edges on the bottom surface 232 toward the intermediate imaginary plane 233. 26 201043365 Referring now to Figures 10(a) and 10(b), wherein Figure 10(a) is a perspective view and Figure 1(6) is a top view; a specific form of a generally triangular double-sided cutting insert 260 is shown having one The face 261 and a bottom surface 262 are separated by an intermediate virtual plane 263. The double-sided cutting insert 26 has a total of three peripheral surfaces 271-273 associated with the top surface 261, which can be indexed around the center 274 of a bolt through hole 277, meaning that the double-sided cutting insert 260 has six indexable cutting edges. . Only the peripheral surface 271 of the top surface 261 is taken as an example. Each of the convex cutting edges 281 may include only one curved cutting edge region 282 connected to a tenon 284. Each of the three convex cutting edges on each of the top surface 261 and the bottom surface 262 may be the same. The curved cutting edge region 282 can have a radius greater than or equal to twice the maximum radius that can be inscribed on the top surface 261. Each of the peripheral surfaces 271-273 of the top surface 261 of the double-sided cutting insert 260 may further include a main conical peripheral surface 285' extending from the curved cutting edge region 282 toward the intermediate imaginary plane 263 and a self-embossing 284 toward the intermediate imaginary plane 263 extends the secondary conical peripheral surface 287. Further, a common lateral seating surface 278 can be placed adjacent each of the major conical peripheral surface pairs extending from the top surface 261 and the bottom surface 262 toward the intermediate virtual plane 263, respectively. It is generally understood that the bottom surface 2 can have the same convex cutting edge and associated peripheral surface as the top surface 261. Also like the top surface 261, each of the convex cutting edges on the haptics of the bottom surface 2 may have the same curved cutting edge region, and each of the peripheral surfaces associated with the bottom surface 262 may have the same major and secondary conical peripheral surfaces. In this particular form, for both the top surface 261 and the bottom surface 262, the double-sided cutting insert 260 is not a single row, so that the top surface 261 and the bottom surface 岣 are not twisted relative to each other. Further referring to Figures 11(a) and 11(b) 'where u(a) is a perspective view and Figure uqj) is a top view circle; shown similar to the triangles shown in Figures 10(a) and 10(b) Another triangular double-sided cutting insert 290 of the double-sided insert 26 is specifically formed. The double-sided cutting insert 29〇 also has a top surface 291 and a bottom surface 292 separated by an intermediate virtual plane 293. The double-sided cutting insert 29 has three peripheral tables 27 201043365. The faces 301-303 are connected to the top surface 291, and can surround the center of a through hole 3〇7. 3〇4 division means that the front surface 291 and the bottom surface 292 are combined. One can be indexed by the cutting edge. Only the peripheral surface 301 of the top surface 291 is taken as an example. It can be seen that each of the peripheral surfaces 301-303 has a convex cutting edge 311 connected to -&amp; Each of the convex cutting edges 311 of this particular form can include both a curved cutting edge region 312 and a substantially straight major cutting edge region 313 between the curved cutting edge region 312 and the tenon 314. The curved cutting edge 312 can have a larger radius than or equal to twice the maximum radius that can be inscribed on the top surface 291, as in the specific form of the double-sided cutting insert described above. Each of the peripheral surfaces 301-303 associated with the top surface 291 可 can include a main conical peripheral surface 315 extending from the curved cutting edge region 312 toward the intermediate imaginary plane 293, with a substantially straight major major cutting edge region 313 facing the middle The imaginary plane 293 extends a flat main facet 316, and a secondary conical peripheral surface 317 extending from the ridge 314 toward the intermediate imaginary plane 跗3. In addition, a common lateral seating surface 308 can be disposed adjacent the peripheral surface of the main cone extending from the top surface 301 and the bottom surface 302 toward the intermediate virtual plane 293, respectively. As with the generally triangular double-sided cutting insert 260 and the generally pentagonal cutting insert 23', it will generally be understood that the bottom surface 302 can have the same convex cutting edge and Ο associated peripheral surface as the top surface 301. Also like the top surface 301, each of the convex cutting edges on the bottom surface 302 may have the same curved cutting edge region, and each of the peripheral surfaces associated with the bottom surface 302 may have the same primary and secondary conical peripheral surfaces. In this particular form, for both the top surface 261 and the bottom surface 2, the double-sided cutting insert 290 having the substantially straight major cutting edge region 313 is a single row, so that the top surface 301 and the bottom surface 302 are relatively twisted relative to each other. . To this end, some non-limiting specific forms of single-row, double-sided cutting inserts for high feed milling are described herein. These single-row, double-sided cutting inserts are available in a variety of known sizes and shapes and may be suitable for a variety of drilling applications. It will be apparent to those skilled in the art that the present disclosure may exemplify the various aspects of the present invention. Therefore, various aspects that may be unnecessary to facilitate the understanding of the present invention may not be present, and the description is simplified. In addition, the present invention is to be construed as being limited to the specific embodiments of the present invention, and various modifications and variations of the present invention will be apparent to those skilled in the art. All such variations and modifications of the present invention are intended to be covered by the scope of the foregoing description and the appended claims. Q [Description of main component symbols] 10, 55, 8 Bu 12 Bu 161, m, 202a-e, 230, 260, 290: Double-sided cutting insert 11, 123, 162, 172, 231, 261, 291: Top surface 12 , 125, 163, 173, 232, 262, 292: bottom surface 13, 126, 164, 174, 233, 263, 293: intermediate virtual plane 14, 83, 247, 277, 307: through hole / screw hole 15: central axis 16, 51, 150: plateau 19, 20, 241-245, 271-273, 301-303: peripheral surface 21 ' 31 ' 90 ' 100 ^ I22a-d &gt; 124a-d &gt; 165a-d ' 175a-d ' 251 ' 281 ' 311 : 凸 convex cutting edges 22, 32, 95, 105, 132, 134, 136, 138, 176a-d, 252, 282, 312: curved cutting edge regions 23, 33, 94, 104, in 253: substantially straight major cutting edge regions 24, 34, 93, 103: substantially flat secondary cutting edge regions 25, 35, 92, 102, 106, 131, 133, 135, 137, 167a-d, 177a-d , 254, 284, 314: tenons 26, 36, 122, 123, 151, 152, 255, 285, 315: main conical peripheral surface 27, 37, 256, 316: flat main facet 28, 38: flat moment Face 29 201043365 29, 39, 159, 257, 287, 317: Sub-cone perimeter table Faces 41, 121, 153, 170, 180, 248, 278, 308: lateral seating surfaces 45, 46, 156, 168, 178: chipbreaker/machine geometry 52, 53: surface 57: virtual convex center Line 58: points 59, 82, 144: inscribed circles 61-65, 71-75: cutting edge region 70: virtual convex center 84, 147: PO line segments Q 97, 107, 113, 114, 116, 146: straight line 141: virtual main line 143, 145: tenon center line 155, 158: outer contour 157, 169, 179: center line 200: milling system 201: tool holder 203: cutting axis 204: radial center line 205: representative workpiece Straight line 〇 246, 274, 304 of the operating surface: through hole center 30

Claims (1)

201043365 VII. Patent application scope: 1. A double-sided cutting insert having a plurality of convex cutting edges, the double-sided cutting insert comprising: a. - a face and a bottom face, separated by an intermediate virtual plane, b. At least three convex cutting edges on each of the top and bottom surfaces have at least one curved cutting edge region; c. at least three tenons on each of the top and bottom surfaces, each The tenon connects two of the convex cutting edges; ❹ d· at least three peripheral surfaces extending from each of the top and bottom surfaces to the intermediate imaginary plane, each peripheral surface comprising: i· a self-bending cutting a peripheral surface of the main cone extending from the edge region toward the intermediate imaginary plane, and ii. a secondary conical peripheral surface extending from the convex ridge toward the intermediate imaginary plane; and e. at least three lateral seating surfaces, each A lateral seating surface is formed on the adjacent surface surface of the top surface and the bottom surface of the crucible such that each of the lateral seating surfaces defines a common lateral seating surface of the top surface and the bottom surface. 2. The double-sided cutting insert of claim 1, wherein each of the top and bottom surfaces is provided with a chip breaker geometry. 3. For the double-cutting insert of Patent No. 2, wherein each of the top and bottom surfaces is a single row in the same direction. 4. The double-sided cutting insert of claim 1, wherein: each of said top surface and bottom surface is a single row in the same direction; 31 201043365 each of said convex cutting edges comprises one step - in said variable cutting edge region a substantially straight major cutting edge region intermediate the tenons; and C. each of the peripheral surfaces further comprising a flat main facet extending from the substantially straight major cutting edge toward the intermediate imaginary plane. 5. The double-sided cutting insert of claim 4, wherein each of the top surface and the bottom surface is provided with a chip breaker geometry. 6. A double-sided cutting insert according to claim 4, wherein: 〇a Each convex cutting edge step includes a substantially flat secondary cutting edge region intermediate the substantially straight major cutting edge region and the tenon; and b. each of the peripheral surfaces further includes a self-sufficient A flat sub-facet that extends substantially perpendicularly to the intermediate imaginary plane. 7. The double-sided cutting insert of claim 1, wherein each of the main conical peripheral surfaces associated with the top surface extends outwardly toward the intermediate imaginary plane at a first angle opposite thereto, and Each of the main conical peripheral surfaces associated with the bottom surface also extends outwardly toward the intermediate imaginary plane at an angle opposite the crucible thereof. 8. The double-sided cutting insert of claim 7 wherein each of said common lateral seating surfaces is formed by cutting a portion of an adjacent peripheral surface pair. 9. The double-sided cutting insert of claim 8 wherein each of said common lateral seating surfaces terminates in close proximity to each of said curved cutting edge regions. 10. The double-sided cutting insert of claim 1, further comprising: a. at least one plateau on each of said top and bottom surfaces; said plateau defining a plane substantially perpendicular to said intermediate imaginary plane; And 32 201043365 b· each of the common lateral seating surfaces is substantially perpendicular to the plateau. 11. The double-sided cutting insert of claim 1, wherein each of the tenons comprises at least one of a circular arc, a series of round foxes, and a multi-bow cloud curve. 12. The double-sided cutting insert of claim 1, wherein the radius of each of the curved cutting edge regions is at least the maximum possible inscribed circle radius on the top or bottom surface of the double-sided cutting insert. Double. 13. The double-sided cutting insert of claim 1, wherein a radius of each of the curved cutting edge regions is at least a maximum possible inscribed circle radius on the top or bottom surface of the double-sided cutting insert Four times. 14. The double-sided cutting insert of claim 1, further comprising a chip breaking geometry disposed on each of said top and bottom surfaces. 15. The double-sided cutting insert of claim 1, wherein the top surface is a mirror image of the bottom surface of the intermediate virtual plane. 16. The double-sided cutting insert of claim 15 further comprising a chip breaking geometry disposed on each of said top Q faces and bottom faces. 17. The double-sided cutting insert of claim 1, wherein each of said convex cutting edges further comprises at least one of an elliptical portion, a parabolic portion, and a multi-bow cloud curve. 18. A milling cutter system comprising: a. a cutter body and at least one double-sided cutting insert; and b. said at least one double-sided cutting insert comprises: i. a top surface and a bottom surface, an intermediate virtual Plane separated; 33 201043365 ϋ · at least three convex cutting edges on each of the top and bottom surfaces, each convex cutting edge has at least one curved edge region; on each of the top and bottom surfaces At least three tenons, each tenon connecting two of the convex cutting edges; *ν· at least three peripheral surfaces extending from each of the top and bottom surfaces to the intermediate virtual plane, each peripheral surface The method includes: a main conical peripheral surface extending from the curved cutting edge region toward the intermediate imaginary plane, and a sub-circular peripheral surface extending from the convex to the intermediate imaginary plane; and ν· at least three a lateral seating surface, each lateral seating surface being formed on a pair of adjacent peripheral surfaces of the top surface and the bottom surface such that each lateral seating surface defines a common side of the top surface and the bottom surface Set the surface to the seat. 19. The milling cutter system of claim 18, wherein the cutter body has at least one cutting insert pocket for receiving the at least one double-sided cutting insert, wherein the at least one cutting insert pocket comprises: a - the bottom bearing surface is adapted to abut one of the top surface and the bottom surface when the double-sided cutting member is held in the cutting body hole; lx « vertical placement on the bearing surface upright lateral bearing The walls 'each are adapted to abut one of the common lateral seating surfaces of the double-sided cutting insert; c. the insert-claw portion of the insert, from the vertical placement upright lateral wall facing each One and the bottom bearing surface are defined; and 34 201043365 d. wherein the bottom bearing surface is recessed in the crotch portion. 20. The sharp knife system of claim a, further comprising the cutter body having a plurality of the cutting insert pockets, each adapted to receive one of the double-sided cutting inserts. 21. The milling cutter system of claim π, wherein each of said top and bottom surfaces of said cutting insert is provided with a chip breaker geometry. 22. The milling cutter system of claim 21, wherein each of said top and bottom surfaces is a single row in the same direction. 〇23', such as the milling cutter system of claim 18, wherein: a. each of the top and bottom surfaces is a single row in the same direction; b. each of the convex cutting edges further includes a curved cutting edge region a substantially straight major cutting edge region intermediate the tenon; and c. each of the peripheral surfaces further includes a flat major facet extending from the substantially straight major cutting edge toward the intermediate imaginary plane. 24. The milling cutter system of claim 23, wherein each of said top and bottom surfaces is provided with a 断 chip breaker geometry. 25. The sharp knife system of claim 23, wherein: a. each convex cutting edge further comprises a substantially flat secondary cutting edge region intermediate said substantially straight major cutting edge region and said tenon And each of the peripheral surfaces further includes a flat sub-facet extending from the substantially flat secondary cutting edge toward the intermediate imaginary plane. 26. The sharp knife system of claim 18, wherein each major conical peripheral surface associated with the top surface extends outwardly toward the intermediate virtual plane at a first angle opposite thereto, and 201043365 Each of the main conical peripheral surfaces associated with the bottom surface also extends outwardly toward the intermediate imaginary plane at an angle opposite thereto. 27. The milling cutter system of claim 26, wherein each of said common lateral seating surfaces is formed by cutting a portion of an adjacent peripheral surface pair. 28. The milling cutter system of claim 27, wherein each of said common lateral seating surfaces terminates in proximity of each of said curved cutting edge regions. 29. The milling cutter system of claim 19, further comprising: Q a. at least one plateau on each of said top and bottom surfaces, said plateau defining a plane substantially perpendicular to said intermediate imaginary plane; And b- each of the common lateral seating surfaces is substantially perpendicular to the plateau.螬 30. The sharp knife system of claim 18, wherein each of the tenons comprises at least one of an arc, a series of arcs, and a multi-bow cloud curve. 31. The milling cutter system of claim 18, wherein each of said curved cutting edge regions has a radius of at least a maximum inscribed circular radius on said top or bottom surface of said double-sided cutting insert. Two times. 32. The milling cutter system of claim 18, wherein each of said curved cutting edge regions has a radius of at least two of the largest inscribed circle radii on said top or bottom surface of said double-sided cutting insert. Times. 33. The milling cutter system of claim 18, further comprising a chip breaking geometry disposed on each of said top and bottom surfaces. 34. The milling cutter system of claim 18, wherein the top surface is a mirror image of the bottom surface of the intermediate virtual plane. 36 201043365 35. The milling cutter system of claim 34, further comprising a chip breaking geometry disposed on each of said top and bottom surfaces. 36. The milling cutter system of claim 19, wherein each of said convex cutting edges further comprises at least one of an elliptical portion, a parabolic portion, and a multi-bow cloud curve. 37